Blow-out boot for tires



W. N. AUCLAIR.

BLOW-OUT BOOT FOR TIRES;

APPLICATION F lLED JAN. 3.1921- v Patented Jan. 10, 1922.

1 N V EN TOR A TTORNE PATET FFEQEZ,

WALTER NAFOLEON AUGLAIR, OF ECHO, OREGON. v

BLOW-our BOOT non TIRE-S.

Specification of Letters Patent. Pat t d J 1322 Application filed January 3, 1921. Serial No. 434,629.

To all'whomz't may concern."

Be it known that I, WALTER N. AUoLAIn, a citizen of the United States, residin at Echo, in the county of Umatilla and tate of Oregon, have invented certain new and useful Improvements in Blow-Out Boots for Tires, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to repair boots for pneumatic tires and has for an object to provide a boot which may be placed upon and about the casing of a pneumatic tire in new and improved manner to cure and close a puncture or other break in such tire.

A further object of the invention is to provide a repair boot so formed and conformed as to fit both the exterior and the interior of the tire casing with marginal extremities proportioned to engage under and about the bead for securing the said boot rigidly to the rim to resist the internal pressure applied to the casing.

A further object of the invention is to provide a repair boot having the section formed and conformed to fit the exterior of the casing and with marginal members adapted to overlap within the interior of the casing with the margins of said members passing under the bead in engagement and clamping upon the rim to support the interior stress.

With these and other objects in view, the invention comprises certain novel arrange- I ments, conformations and connections as will be hereinafter more fully described and claimed.

In the drawings:

Figure 1 is a view of the device in transverse section applied to a conventional casing, also in transverse section;

*igure 2 is a view of the device in elevation as applied to a fragment of the casing, also in elevation, showing line 11 as the plane of Figure 1, and

Figure 3 is a perspective view of the device with the fiaps extended in position to apply as to the exterior of the casing.

Like characters of reference indicate corresponding parts throughout the several views.

It is well known that the usual and ordinary casing of a pneumatic tire comprises the tread portion 10, the side portions 11 and the beads 12. Punctures and other fractures of the casing may occur at any point but are more apt to occur as indicated at 19 in Figures 1 and 2 upon the tread. Pro- VlSlOIl, however, must be made for caring for such fractures or punctures wherever they may occur and the present boot makes provision therefor.

The boot comprises a section 13 which is made to conform to the exterior of the easmg and the showing of this boot substantially arcuate, as at Figure 3, is not intended as any limitation upon the invention and the said boot will be formed in any shape required or desired to conform to the exterior shape of any casing, or it may be formed substantially cylindrical, as shown at Figure 3, and by its own resiliency conform itself to the shape of the casing, as shown at Figure 1.

For convenience in placing this boot upon the casing it is preferably formed with V- shaped grooves 14 which fit into and above the beads 12 and is then drawn over the form of the bead and about the inside of the casing and over the opposite head. The second fiap fits also into the groove of the last-mentioned bead and is drawn over the flap previously positioned about the inside of the casing and incidentally the inside of the contained flap and over the first-mew tioned bead. Thus we have a double thickness of the flap material entirely about the inside of the casing and under both beads so that the clamping of the head by the rim clamps the margins of these flaps in position to support the strain of the inner tube. As the strain of the inner tube is thus taken up both internally and externally, it is obviousthat even a very bad fracture may be temporarily repaired by this boot. The boot below the tread surface is, of course constructed of fabric which, for the purpose of waterproofing, may be rubberized, and is very flexible, and the form shown at Figure 3 is rather imaginary and illustrative than any position which it will actually assume. It, therefore, follows that in placing this device upon the casing the flaps would first assume the position shown in dotted lines at 15 and when clamped under the flange of the rim will be forced into the grooves 14 tightening the exterior fold of the boot firmly about the exterior of the casing. Provision is, therefore made, not only to sustain the internal pressure andthe external conformed to fit over and upon the exterior of the casing With flaps upon the edges of said tread sections, each properly proportioned to pass about the bead and the entire interior of the casing and about the opposite bead, both flaps overlapping and presenting a double surface Within the entire inner area of the casing.

In testimony whereof I hereunto aflix my 7 signature in presence of two Witnesses.

XVALTER NAPOLEON AUQLAIR. Witnesses:

W. H. CRARY; F. J. IROME. V 

